nsprpub/lib/libc/src/strdup.c

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* ***** BEGIN LICENSE BLOCK *****
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  37
  38 #include "plstr.h"
  39 #include "prmem.h"
  40 #include <string.h>
  41
  42 PR_IMPLEMENT(char *)
  43 PL_strdup(const char *s)
  44 {
  45     char *rv;
  46     size_t n;
  47
  48     if( (const char *)0 == s )
  49         s = "";
  50
  51     n = strlen(s) + 1;
  52
  53     rv = (char *)malloc(n);
  54     if( (char *)0 == rv ) return rv;
  55
  56     (void)memcpy(rv, s, n);
  57
  58     return rv;
  59 }
  60
  61 PR_IMPLEMENT(void)
  62 PL_strfree(char *s)
  63 {
  64     free(s);
  65 }
  66
  67 PR_IMPLEMENT(char *)
  68 PL_strndup(const char *s, PRUint32 max)
  69 {
  70     char *rv;
  71     size_t l;
  72
  73     if( (const char *)0 == s )
  74         s = "";
  75
  76     l = PL_strnlen(s, max);
  77
  78     rv = (char *)malloc(l+1);
  79     if( (char *)0 == rv ) return rv;
  80
  81     (void)memcpy(rv, s, l);
  82     rv[l] = '\0';
  83
  84     return rv;
  85 }